Vespa 125/150/Rally '57-
VESPA
125 (T1/125) (D) 125 ccm 2T AC '57-'59 VNA1-2

VESPA 125 (T1/125) (D) 125 ccm 2T AC '57-'59 VNA1-2

Photo from VESPA 125 (T1/125) (D) 125 ccm 2T AC '57-'59 VNA1-2 | KLASSIK VESPA

Overview Vespa 125

Piaggio revolutionised the design of Italian 125cc scooters with the introduction of the VNA series. This model series marked the end of the traditional design with the Headlight Unit on the Mudguard(lamp at the bottom) and ushered in the era of the so-called Largeframe. These frames consisted of two longitudinally welded pressed sheet metal halves and were used for both 125cc and 150cc models.

Vespa 125 model history

The VNA series from Piaggio departed from the previous tubular handlebar, which was typical of the 125cc models. Instead, a completely redesigned handlebar unit was inserted, which featured an integrated Headlight Unit as well as internally routed wires and cables. The Handlebar was made up of two pressed sheet metal halves, with the upper half in particular standing out for its ease of maintenance, as it was easy to dismantle. However, it was decided to switch to cast aluminium Handlebars in later models, presumably due to concerns about susceptibility to rust and stability.
The ACMA 125 Type N model, which was produced under licence in France, is largely identical to the Vespa 125 VNA in terms of its specifications and features.

The Engine of the Vespa 125

The Vespa 125 brought many technical innovations with it. For example, the Engine Swing Arm Pivot became an integral part of the left half of the engine instead of being mounted separately as before. The cooling air duct, which had previously been fitted separately, was installed in the right-hand half of the engine. The kick-start mechanism was also revised: instead of the previous kick-start bell, a lever with kick-start shaft and toothed segment was introduced. The Air Filter and carburettor unit, which had previously been housed in the chassis, was relocated above the Cylinder. This innovation enabled the Vespa to draw the petrol-air mixture directly from the Dellorto UA 16 SI Carburettor without the use of an Intake Manifold. These improvements led to a significant reduction in the noise level to below 81 phons.

Used Vespa 125 market situation

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Other Vespa 125

On the German version of the Vespa 125 VNA with Seat, the Choke Lever has a special design. It faces forwards and is positioned below the top of the Seat. Due to the limited tuning options of the directly aspirated engine, many owners nowadays decide to retrofit the VNA with an engine from the PX or T5 series. Interestingly, this conversion is also possible while retaining the VNA's 8-inch wheels. Another specific feature of the VNA is its Fuel Tap, which has a smaller diameter at the connection point to the Tank and whose outlet points vertically downwards. The union nut in the Tank has a spanner width of 22 mm.

The colours of the Vespa 125:

Colour

Colour Name

Max Meyer Code

Colour info

grigio-1-268-0983

Grigio

15046

1957-1958

grigio-beige-chiaro-15099

Grigio beige chiaro

15099

1958-1959

alluminio-1-268-0983-3

Grigio

1.268.0983

Frame Parts

grigio-8012m

Grigio

8012M

Rust protection/primer

Sources

General Information

  • Producer VESPA
  • Model 125 (T1/125) (D)
  • Displacement 125 ccm
  • Cycles and cooling 2T / AC
  • Year of construction `57-`59
  • Type VNA1-2
  • Chassis number (from/to) 1001 - 116431
  • Built quantity 115431
  • Dimension KLASSIK VESPA
  • Vehicle type Vespa 125/150/Rally '57-

Years of production & chassis numbers

  • Year of construction:

Technical data

  • Chassis type: self-supporting steel frame
  • Chassis number position: at the rear under the left side jaw
  • Length: 1735 mm
  • Width: 655 mm
  • Height: 985 mm
  • Wheelbase: 1180 mm
  • Ground clearance: 130 mm
  • Weight (empty): 87 kg
  • Performance (PS): 4.5 PS
  • Performance (kW): 3.3 kW
  • at rpm: 5000
  • Top speed: 75 km/h
  • Engine type: 2-stroke internal combustion engine
  • Engine manufacturer: PIAGGIO
  • Engine number: VNA1M
  • position of engine number: right side Engine Swing Arm Pivot

Engine - cylinders, clutch & exhaust

  • Displacement: 123.7 ccm
  • Bore: 54 mm
  • Stroke: 54 mm
  • Number of cylinders: 1
  • Transfer ports: 2
  • Type of cooling: Air
  • Compression: 6,5
  • Starter: Kickstarter
  • Clutch: Multi-disc clutch in oil bath on the Crankshaft
  • Clutch type: Ø 108 mm, 3 Clutch Friction Plates, 6 Springs

Engine - Carburetor

  • Mixture preparation: Carburetor
  • Type of carburetor: UA16S1
  • Main jet: 63 bis VNA1M 036776, 72 ab VNA1M 036777
  • Mixing tube: 48 bis VNA1M 036776, 38 ab VNA1M 036777

Engine - Transmission

  • Type of gearbox: Manual gearstick
  • Number of gears: 3
  • Gear rotation: 1st gear: 14:56 Z (4,00)
  • Gear rotation: 2nd gear: 20:50 Z (2,50)
  • Transmission: 3rd gear: 27:43 Z (1,59)
  • Gear rotation: Total: im 3. Gang: 4,85
  • Transmission: Primary: 22:67 Z (3,05)

Engine - Ignition

  • Ignition type: Interruptor ignition
  • Ignition timing: 28 °
  • Charging power (ignition): 30 W
  • Spark plug type: NGK B7HS / Bosch W5AC
  • Spark plug thread: short thread
  • Pre-ignition timing: 28

Chassis - tires and rims

  • Front tyre(s): 3.50x8
  • Front rim(s): 2.10x8
  • Rear tyre(s): 3.50x8
  • Rear rim(s): 2.10x8
  • Front tyre pressure: 1,2
  • Rear tyre pressure: 1,3 - 2,1

Chassis - Brakes

  • Brake system: Drum Brake
  • Front brake: Ø inside 125 mm lining width: 18 mm
  • Front brake operation: mechanical with Cable
  • Rear brake: Ø inside 127 mm pad width: 23 mm
  • Rear brake operation: mechanical with Cable

Chassis - steering column & swing arm

  • Front wheel guide: short swing arm with one arm
  • Rear wheel guide: Drive set swing arm
  • Front suspension: Shock Absorber L 175 mm, separate Springs L 155 mm
  • Rear suspension: Shock Absorber L 390 mm, integrated Springs

Electronics

  • Alternator: 6 Volt - 30 Watt, swing light magneto ignition
  • Headlights: 6V 25/25W BA20d
  • Parking light: 6V 3W
  • Taillights: 6V 3W
  • Horn: 6 V AC

Operating materials

  • Fuel tank capacity: 7.7 l
  • Mixing ratio: 1:50
  • Range (approx.): 360 km
  • Gearbox oil: SAE 30
  • Amount of gearbox oil: 0.25 l
  • Fuel consumption: 2 l/100km

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